Which term describes blindness due to brain injury or dysfunction?

• A. Low vision
• B. Legally blind
• C. Functions at the definition of blindness
• D. Visual field restrictions

Answer: (C)

When blindness is due to brain injury or dysfunction, the important idea is that the person’s functional ability meets the official definition of blindness even if the eyes themselves aren’t damaged. The term here emphasizes that the limitation comes from how the brain processes visual information, not from the eye’s health. So, the phrase describing someone who “functions at the definition of blindness” best captures that brain-based, function-centered concept.

Low vision implies some usable sight remains, so it doesn’t describe complete blindness. Legally blind focuses on meeting a legal threshold for eligibility, which is about acuity and field and may involve eye or brain issues but isn’t specifically about blindness caused by brain dysfunction. Visual field restrictions refer to loss of peripheral vision, which is a specific type of impairment and not the brain-based processing problem described above.